Java JProgressBar动态更改条颜色
我正在使用Java JProgressBar动态更改条颜色,java,swing,jprogressbar,nimbus,uimanager,Java,Swing,Jprogressbar,Nimbus,Uimanager,我正在使用JProgressBar组件和Nimbus UI默认值。问题是,当我想手动更改每个progressbar的条形图颜色时,我通过设置JProgressBar.setUI()函数使用BasicProgressBarUI。这会带来更多麻烦,因为我只想更改条的颜色,而我似乎失去了jprogressbar的默认外观(Border,backgroundcolor) 因此,我可以在代码初始化时设置Nimbus ProgressBar的UIDefaults。它起作用了 但我想动态更改每个progres
JProgressBar
组件和Nimbus UI默认值。问题是,当我想手动更改每个progressbar的条形图颜色时,我通过设置JProgressBar.setUI()
函数使用BasicProgressBarUI
。这会带来更多麻烦,因为我只想更改条的颜色,而我似乎失去了jprogressbar的默认外观(Border,backgroundcolor)
因此,我可以在代码初始化时设置Nimbus ProgressBar的UIDefaults
。它起作用了
但我想动态更改每个progressbar的条颜色
是否有其他方法可以更改JProgressBar
的条形图颜色
public class ProgressGenerator extends JFrame {
protected int minValue = 0;
protected int maxValue = 100;
protected int counter = 0;
protected JProgressBar progressBar;
public ProgressGenerator() {
super("JProgressBar Demo");
setSize(300, 100);
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (InstantiationException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (IllegalAccessException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
} catch (UnsupportedLookAndFeelException e1) {
// TODO Auto-generated catch block
e1.printStackTrace();
}
progressBar = new JProgressBar();
progressBar.setMinimum(minValue);
progressBar.setMaximum(maxValue);
progressBar.setStringPainted(true);
progressBar.setForeground(Color.GREEN);
JButton start = new JButton("Start");
start.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
Thread runner = new Thread() {
public void run() {
counter = minValue;
while (counter <= maxValue) {
Runnable runme = new Runnable() {
public void run() {
progressBar.setValue(counter);
}
};
SwingUtilities.invokeLater(runme);
counter++;
try {
Thread.sleep(100);
} catch (Exception ex) {
}
}
}
};
runner.start();
}
});
getContentPane().add(progressBar, BorderLayout.CENTER);
getContentPane().add(start, BorderLayout.WEST);
WindowListener wndCloser = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
addWindowListener(wndCloser);
setVisible(true);
}
public static void main(String[] args) {
new ProgressGenerator();
}
}
公共类ProgressGenerator扩展JFrame{
受保护的int最小值=0;
受保护的int最大值=100;
受保护整数计数器=0;
受保护的JProgressBar progressBar;
公共发电机(){
超级(“JProgressBar演示”);
设置大小(300100);
试一试{
UIManager.setLookAndFeel(“com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel”);
}捕获(ClassNotFoundException e1){
//TODO自动生成的捕捉块
e1.printStackTrace();
}捕获(实例化异常e1){
//TODO自动生成的捕捉块
e1.printStackTrace();
}捕获(IllegalacessException e1){
//TODO自动生成的捕捉块
e1.printStackTrace();
}捕获(不受支持的LookandFeelException e1){
//TODO自动生成的捕捉块
e1.printStackTrace();
}
progressBar=新的JProgressBar();
progressBar.setMinimum(最小值);
progressBar.setMaximum(最大值);
progressBar.SetStringPaint(真);
progressBar.setForeground(颜色为绿色);
JButton start=新JButton(“start”);
start.addActionListener(新ActionListener(){
已执行的公共无效操作(操作事件e){
线程运行器=新线程(){
公开募捐{
计数器=最小值;
而(counterNimbus支持每个组件蒙皮,如其他QA中已经回答的。应用于JProgressBar“bar”意味着使用自定义foregroundPainter配置实例,如:
progressBar = new JProgressBar();
UIDefaults defaults = new UIDefaults();
Painter painter = new MyPainter(Color.GREEN);
defaults.put("ProgressBar[Enabled].foregroundPainter", painter);
defaults.put("ProgressBar[Enabled+Finished].foregroundPainter", painter);
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", Boolean.TRUE);
progressBar.putClientProperty("Nimbus.Overrides", defaults);
最丑的画家应该是:
public static class MyPainter extends AbstractRegionPainter {
private Color fillColor;
public MyPainter(Color color) {
// as a slight visual improvement, make the color transparent
// to at least see the background gradient
// the default progressBarPainter does it as well (plus a bit more)
fillColor = new Color(
color.getRed(), color.getGreen(), color.getBlue(), 156);
}
@Override
protected void doPaint(Graphics2D g, JComponent c, int width,
int height, Object[] extendedCacheKeys) {
g.setColor(Color.GREEN);
g.fillRect(0, 0, width, height);
}
@Override
protected PaintContext getPaintContext() {
return null;
}
}
为了让它看起来更美观,请查看ProgressBarPainter:它是包私有的,所以除了了解它是如何实现渐变/路径绘制并在自定义实现中执行相同的操作之外,您别无选择。+1以Kelopatra为第一名
下面是我举的一个例子:
JProgressBar颜色最初通过以下方式设置:
UIDefaults defaults = new UIDefaults();
defaults.put("ProgressBar[Enabled].foregroundPainter", new MyPainter(Color.GREEN));
defaults.put("ProgressBar[Enabled+Finished].foregroundPainter", new MyPainter(Color.GREEN));
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", Boolean.TRUE);
progressBar.putClientProperty("Nimbus.Overrides", defaults);
进度达到50%时,颜色将变为红色:
if (progressBar.getValue() == 50) {//change color on 50%
UIDefaults defaults = new UIDefaults();
defaults.put("ProgressBar[Enabled].foregroundPainter", new MyPainter(Color.RED));
defaults.put("ProgressBar[Enabled+Finished].foregroundPainter", new MyPainter(Color.RED));
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", Boolean.TRUE);
progressBar.putClientProperty("Nimbus.Overrides", defaults);
}
Test.java:
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.event.*;
import java.beans.*;
import javax.swing.*;
public class Test {
public static void createAndShowGUI() {
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
final JProgressBar progressBar = new JProgressBar();
progressBar.setStringPainted(true);
progressBar.setValue(0);
progressBar.setBorderPainted(false);
JButton startButton = new JButton("Start");
startButton.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent ae) {
UIDefaults defaults = new UIDefaults();
defaults.put("ProgressBar[Enabled].foregroundPainter", new MyPainter(Color.GREEN));
defaults.put("ProgressBar[Enabled+Finished].foregroundPainter", new MyPainter(Color.GREEN));
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", Boolean.TRUE);
progressBar.putClientProperty("Nimbus.Overrides", defaults);
SwingWorker worker = new SwingWorker() {
int current = 0, lengthOfTask = 100;
@Override
public Void doInBackground() {
while (current <= lengthOfTask && !isCancelled()) {
try { // dummy task
Thread.sleep(50);
} catch (InterruptedException ie) {
}
setProgress(100 * current / lengthOfTask);
current++;
}
return null;
}
};
worker.addPropertyChangeListener(new PropertyChangeListener() {
@Override
public void propertyChange(PropertyChangeEvent pce) {
String strPropertyName = pce.getPropertyName();
if ("progress".equals(strPropertyName)) {
int progress = (Integer) pce.getNewValue();
progressBar.setValue(progress);
if (progressBar.getValue() == 50) {//change color on 50%
UIDefaults defaults = new UIDefaults();
defaults.put("ProgressBar[Enabled].foregroundPainter", new MyPainter(Color.RED));
defaults.put("ProgressBar[Enabled+Finished].foregroundPainter", new MyPainter(Color.RED));
progressBar.putClientProperty("Nimbus.Overrides.InheritDefaults", Boolean.TRUE);
progressBar.putClientProperty("Nimbus.Overrides", defaults);
}
}
}
});
worker.execute();
}
});
JPanel holder = new JPanel();
holder.add(progressBar);
holder.add(startButton);
frame.add(holder);
frame.pack();
frame.setVisible(true);
}
public static void main(String[] args) {
SwingUtilities.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
ex.printStackTrace();
}
createAndShowGUI();
}
});
}
}
class MyPainter implements Painter<JProgressBar> {
private final Color color;
public MyPainter(Color c1) {
this.color = c1;
}
@Override
public void paint(Graphics2D gd, JProgressBar t, int width, int height) {
gd.setColor(color);
gd.fillRect(0, 0, width, height);
}
}
导入java.awt.Color;
导入java.awt.Graphics2D;
导入java.awt.event.*;
导入java.beans。*;
导入javax.swing.*;
公开课考试{
公共静态void createAndShowGUI(){
JFrame=新JFrame();
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
最终JProgressBar progressBar=新JProgressBar();
progressBar.SetStringPaint(真);
progressBar.setValue(0);
progressBar.com(假);
JButton startButton=新JButton(“开始”);
addActionListener(新ActionListener()){
@凌驾
已执行的公共无效行动(行动事件ae){
UIDefaults=新的UIDefaults();
defaults.put(“ProgressBar[Enabled].foregroundPainter”,新的MyPainter(Color.GREEN));
defaults.put(“ProgressBar[Enabled+Finished].foregroundPainter”,新的MyPainter(Color.GREEN));
progressBar.putClientProperty(“Nimbus.Overrides.InheritDefaults”,Boolean.TRUE);
progressBar.putClientProperty(“Nimbus.Overrides”,默认值);
SwingWorker worker=新SwingWorker(){
int电流=0,长度为100;
@凌驾
公共无效doInBackground(){
虽然(当前为了更好的帮助,请尽快发布一个简短的、可运行的、可编译的、否则必须搜索的帖子,google可以返回类似的问题/答案,显示如何使用UIDefaults
和putClientProperty
更改单个JProgressBar
颜色作为@DavidKroukamp链接的答案,您应该包括您在内。)r custom.我想通过progressBar.setForeground更改条形图的颜色-我想通过剪手指来赚钱:-)或者换句话说:如果我们采用了错误的方法,我们将无法获得预期的结果。重复垃圾桶-请参阅@DavidKroukamp@DavidKroukamp自定义ui通常是错误的方法(而且要做的工作要比你期望的多得多)-只有在你需要核心UI没有提供的功能时才建议使用。据我所知,这只是一个配置问题,可以在另一个线程中解决。+1别忘了“ProgressBar[Enabled+Finished]。foregroundPainter”或者它将在100%Completion+1时恢复到原始状态,以便根据值动态更改颜色,触感良好:-)@David Kroukamp这是否意味着我可以覆盖JProgressBar的setBackground和setForeground方法并应用UI默认值,对吗?@DavidKroukamp我对Painter类有疑问。progressbar中的条我希望它不超过边界区域。我尝试更改g.fillRect(0,0,宽度,高度-4);它确实会改变底部,但顶部仍然超出边界。有解决方案吗?